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ZX Review #11-12
26 ноября 1997 |
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Forum - Conversion of Spectrum color images at IBM. Conversion of B / W images from IBM's ZX Spectrum.
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HELLO!!!
Write to you Max 'Alex from
"CYBERAX Software" (Kemerovo).
After a long break, we have 3-4 issues ZX-REVIEW.
Admittedly, we are not very happy electronic format of the
journal, although We do not own cluster Spectrum: the printed
version is much easier to read (you can even sensitive
vshrapnut, covered his face with your favorite magazine ...)
and much more easier to type out her listings
programs (by the way, once you have moved to electronic form,
then why do not you make a
Journal of procedures from text files of articles in popular
formats assemblers, for example, MASM, ZEUS, XAS, and others??)
During his absence from the magazine
We have accumulated a large number of procedures, of which we
would like to share with readers the ZX-REVIEW.
The first procedure is designed to convert color images
Spectrum at IBM. The result of her work is 16tsvetnaya image
256 * 192 points in as BMP, which can then be transferred to
the MS-DOS to any relevant copiers (ISDOS Copy, IBMCOPY, etc.)
The resulting image can be loaded into any image editor for
IBM, print (eg, a color printer) convert, etc.
Now, the procedure itself:
140.
ORG 35000
LD HL, HEADER
LD DE, PIC
LD BC, 120
LDIR
LD HL, PIC +24566
LD (LINE), HL
LD A, 192
LD (YS), A
LD HL, 16384
LD (SCADR), HL
MAIN LD B, 32
CYCLE LD HL, (SCADR)
LD C, (HL)
LD A, H
SRL A
SRL A
SRL A
OR 88
LD H, A
LD A, (HL)
LD (ATR), A
LD D, 4
LOOP SLA C
PUSH DE
CALL PSET
POP DE
LD E, A
SLA E
SLA E
SLA E
SLA E
SLA C
PUSH DE
CALL PSET
POP DE
OR E
LD HL, (LINE)
LD (HL), A
INC HL
LD (LINE), HL
DEC D
JR NZ, LOOP
LD HL, (SCADR)
INC HL
LD (SCADR), HL
DJNZ CYCLE
LD HL, (LINE)
LD DE, 256
OR A
SBC HL, DE
LD (LINE), HL
LD HL, (SCADR)
LD DE, 32
OR A
SBC HL, DE
INC H
LD A, H
AND 7
JR NZ, DCONT
LD A, L
ADD A, 32
LD L, A
JR C, DCONT
LD A, H
SUB 8
LD H, A
DCONT LD (SCADR), HL
LD A, (YS)
DEC A
LD (YS), A
JP NZ, MAIN
RET
PSET JR NC, PAPER
LD A, (ATR)
LD E, A
AND 7
LD D, A
LD A, E
AND 64
RRCA
RRCA
RRCA
OR D
LD H, 0
LD L, A
LD DE, TABLE
ADD HL, DE
LD A, (HL)
RET
PAPER LD A, (ATR)
AND 120
RRCA
RRCA
RRCA
LD H, 0
LD L, A
LD DE, TABLE
ADD HL, DE
LD A, (HL)
RET
LINE DW 0
SCADR DW 0
YS DB 0
ATR DB 0
TABLE DB 0,4,1,5,2,6,3,7,0
DB 12,9,14,10,14,11,15
PIC EQU 40704
HEADER DW # 4D42, # 6076, # 0000, # 0000
DW # 0000, # 0076, # 0000, # 0028
DW # 0000, # 0100, # 0000, # 00C0
DW # 0000, # 0001, # 0004, # 0000
DW # 0000, # 6000, # 0000, # 0ECE
DW # 0000, # 0EC4, # 0000, # 0000
DW # 0000, # 0000, # 0000, # 0000
DW # 0000, # 0000, # 0080, # 8000
DW # 0000, # 8000, # 0080, # 0080
DW # 0000, # 0080, # 0080, # 8080
DW # 0000, # C0C0, # 00C0, # 8080
DW # 0080, # 0000, # 00FF, # FF00
DW # 0000, # FF00, # 00FF, # 00FF
DW # 0000, # 00FF, # 00FF, # FFFF
DW # 0000, # FFFF, # 00FF, # 0000
2
Now about how to use the procedure: assembliruete it
Spectrum upload the picture on the screen with the address
16384 and start the procedure. After that, the memory address
40704 contains a block length 24694 bytes which will need to
copy in MS-DOS with the extension BMP.
The second procedure performs
inverse problem - to convert
black and white picture with IBM on
SPECTRUM (256 * 192 points, the length of
6,206 bytes, the extension BMP), of course, previously migrated
to the TR-DOS.
Here is its listing:
140.
ORG 40000
LD C, 192
LD HL, PIC +6174
LD DE, 16384
LP1 PUSH HL
PUSH DE
LD B, 32
LP2 LD A, (HL)
LD (DE), A
INC HL
INC DE
DJNZ LP2
POP DE
POP HL
LD A, L
SUB 32
LD L, A
LD A, H
SBC A, 0
LD H, A
INC D
LD A, D
AND 7
JR NZ, C1
LD A, E
ADD A, 32
LD E, A
JR C, C1
LD A, D
SUB 8
LD D, A
C1 DEC C
JR NZ, LP1
RET
PIC EQU 45000
2
Assembliruete it, ship the original image at address 45000,
start the procedure and get on the screen converted
image in the Spectrum
(Alas, no attributes ...)
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